Joint for well-casings.



A. G. PELKERJ Jom'r r03 WELL mamas.

APPLIUATION FILED NOV. 20, 1909.

Patented NOV. 19, 1912.

2O a and operated within the tu UNITED STATES. PATENT orFroE.

ALBERT G. FELKEBQOE MARSHFIELD, WISCONSIN.

Join-r Ion WELL-casinos.

To all whom may concern:

Be it known that I, ALBERT .GoFE-LKnn,

a citizen of the United States, residing at Marshfield, in the county ofWood and State of Wisconsin, have inventeda new and usefui Joint forWell-Casings, of which the following is a specification.

This invention isan improved joint for sectional sheet metal tubes andis intended more particularly for well. casings although it is adaptedto many uses.

The primary object of the invention is to provide a joint between 'themembers of a sheet metal tube which will be so constructed as to avoidthe presence of internal shoulders or projections which are liable to,be struck by the sharpened edges of drills passing through awell.-oasing in the sinking of a well or by pump rods or other deviceswhich'ma-y be subsetgiently arranged e or casing.

In the use. of constructions heretofore provided, much" annoyance hasbeen caused by the drill or. the pump rod or other elements strikingagainstabrupt mternalprojections or shoulders on. the casing andbeingthereby marred or more seriously damaged so that,

delay in the sinking of the well resulated and it was necessary tofrequently stop the operation of the pump to repairbroken parts. Theconstruction'devised by me and forming the subject matter of the presentappli cation thoroughly overcomes these defects and prolongs the life ofthe casing as 'well -as' the life of the elements operated within thesame.

- i The stated object and such other inciden- 'tal objects as willhereinafter a pear are attained in, the device illustrated in the ac-'40 co'mpanying drawings, and the invention consists in certain novelfeatures which will be hereinafter first fully described and thenspecifically claimed.

" ing my inventibm. Fig. 2 is a longitudinal section of a portion of thetube shown in Fig. 1 with the parts separated: Fig. 3

is asimilar view showing thepart s joined.

Fig. 4 is .alongitudinal'section of two tube sections jointed" inaccordance with my invention.

of which consistsof four sections 1, 2, 3

and 4, as shown in Fig.1.- Each of these lengths Specification ofLetters Yatent. Palte ted Nov. 19, HIKE. Application filed November 20,1909. Serial No. 528,102.

exterior annular bead,'5, which constitutes a stop to limit the movementof the other section and. defines the male end 50, This result is causedby the end of the said other section bearing against the stop head 5, aswill be readily understood,-,and as shown in Figs. 1 and 3. Near itsopposite end each section is provided with a tapering or contractedportion 6 whereby an internal shoul-- der 7 is provided, which shoulderdefines the female end and is adapted'to be en'- gaged by the maleend-of a meeting section when two sections are fitted together. -'Iheinner surface of the section will thus present an mclined or taperedsurface 8 so that should the drill or the pump rod or other elementworking within the tube sway to one side itwill strike the said inclined'surface 8 and be thereby deflected away from the sharp shoulder or edgeresented b the end of the inner or engaged consequently, the defacing'orcutting of the surface of the working element will be avoided. v Threeimportant advantages are gained by the contracted portion, 6, asfollows-the resulting shoulder acts as an internal-stop bead to preventfurther longitudinal movement of the connecting member, it acts as adeflector by reason 0 its inclined surface and, it positlvelyprotectsthe otherwise exsection an sections is provided near one end with anposed end of the inner tube so that elements moving within meet with noobstruction and cannot come in contact with abrupt edges or surfaces. Afourth advantage is that the contracting-of the connecting memberresultsin the inclined surface and shoulder rendering the tube more firmand causes it to retainits round-form. The end sections, land 4, of eachmember or length of the tube are each provided at one end with spi-.rally disposed beads or threads, 9, which are In the drawings, Figure'lis a side view of a length of 'a sheet metal :tube embody.

adapted to engage similar beads or threads on' the ends of meetinglengths to ciiup'le the into a casing or tube, as will be readilyunderstood on reference to Fig. 4.

In constructing a tube according to my invention, thesections 1, 2, 3and 'are driven tightly together,-'as shown in 'Fig.

1, and the meeting ends secured by rivets, 10. The lengths thus producedare shipped to the point where the tube is to be used and thereassembled by rotating the end- ,section- 1 of one length upon the endsec tion 4: of another length with the threads ea h simultaneowlyengages the extremity V of the other o that the strain is notconcentrated upon one member and tcleseopino ot' the llltitll tlh of thejoint is positively" prhrente l. The lemale'entl of each section heiontlthe tapering or contracted portion is Slightly ejreater in tlianleterthan the male CIItt 5o they will tit, nieely together. \Yith my(anmll'in'tion, the length are'arra-ngctl with the smaller or male enttupward, antl the t'mnale entl ol? the meeting section is titled may herunning (town the outside of the tulle will he carried over the jointZUlLt prerented l'rom paesing through the same into the tube or easing.1t wiltbe seen that, when the receiving end of each isection 'bearsagainst the etop head on the other section it. eonstitutee a seattherefor, the internal deflector T serving to owzrhanethe end in theseat and being at its smaller eml of an internal diameter equal to theinternal diameter 01 the inner or received end.

'hile the ii'ivention is particularly ad VLHMMM over thesame so thatwater Which hanging vantageous an applieil to rgell memes, it may alsohe useit in clown spouts renli lat'in tlllitfj or other ttl-lMH: Theromtrur tion prolongs the lite ol" the tube a well asol'theelrmentoperateil, within, the eaiue.

Having thus le1- rrilnal my invention, what I claim is:

A well easing or the like eonaisting at a plurality oli' tubular Hl'lllHlS having interlittine .male amt .temale portion.-, hilltl see--tionS hein gcircular in cross seetiom the being an outetantline' annularet 'vp he: on the male portion, :tittt a ta wreu portion constituting aninterior annular tleth rtor in the female portion, the internaltliunn-tei of the ,t'emale portion being titlilfilllllt ltlly equal tothe external diameter ot the mate portion, said female portion hearingagainst the atop head amt comtitoting a seat. for the male portion. theinternal tlrllretor everthe male mrtion xml, haun its smallest internaldiameter equal to the in-- ternal diameter of the male portion. andmeans for securing the sections together.

In. testimony that 1 claim the forego ng as my own, I havehereto'allixeil my signature in the presence oi two wt'itmm eea ALBE (Tlilll iltl lit.

' )N'itnesses:

731. J. LANGE, .llitY T. l rniltrtx.

